REDEMABLE NONCONTROLLING INTEREST - ALTUS - Activity Related to Preferred Units (Details) - USD ($) $ in Millions		3 Months Ended
	May 15, 2020	Mar. 31, 2020	Jun. 12, 2019
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance		$ 555
Ending balance		573
Altus Preferred Unit limited partners
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance		555
Allocation of Altus Midstream LP net income		18
Ending balance		573
Altus Midstream LP
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred Units embedded derivative		165	$ 94
Redeemable Noncontrolling Interest, Net Of Embedded Derivative Liability		738
Preferred units, redemption price		$ 682
Preferred Units, redemption terms, internal rate of return		11.50%
Altus Midstream LP | Altus Preferred Unit limited partners
Movement In Preferred Units [Roll Forward]
Preferred Units: beginning of period (in shares)		638,163
Distribution of in-kind additional preferred Units (in shares)		11,168
Preferred Units: end of period (in shares)		649,331
Increase (Decrease) in Temporary Equity [Roll Forward]
Beginning balance		$ 555
Distribution of in-kind additional preferred Units		0
Allocation of Altus Midstream LP net income		18
Ending balance		$ 573
Preferred Units embedded derivative			$ 94
Scenario Forecast | Altus Midstream LP
Increase (Decrease) in Temporary Equity [Roll Forward]
Preferred Units, distribution in-kind	$ 11
Preferred Units, distribution, PIK units (in shares)	11,363